Shepard Tone - Developed by psychologist Roger Shepard at Bell Labs, this illusion is made of a list of tones that seem to perpetually increase or slide. The illusion is designed by super-positioning pure tones (sine waves) an octave apart. But in the research published in March within the https://touhou-danmaku-kagura-pha43108.digitollblog.com/35582764/little-known-facts-about-illusion-of-kundun-mu-online